Journal article

Differential Effects by Mental Health Status of Filling the Medicare Part D Coverage Gap

J Liu, Y Zhang, CM Kaplan

Medical Care | Published : 2021


Objective: The objective of this study was to study how changes in insurance benefit design affect medication use of older adults with mental disorders. Data Sources: US Medicare claims data from 2007 to 2018. Study Design: Exploiting the gradual elimination of the Medicare prescription drug coverage gap beginning in 2011, we examine the effects on medication use and out-of-pocket spending by drug type with a difference-in-differences approach. We identify subpopulations by mental disorder and compare the estimates across mental health groups and to the general Medicare population. Principal Findings: Closing the gap substantially reduced individuals' out-of-pocket spending, and the reductio..

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